Kardashian allegedly began to cry in front of other passengers as she feared that there may be problems with her pregnancy, although she was later given the all-clear by her doctor.

"Kim started feeling ill on the plane from Paris and called friends as soon as she landed," a source said. "She was rushed to her doctor Tuesday night in tears. She thought she was having a miscarriage."

Kardashian was allowed to go home just after midnight, although doctors reportedly warned her that she needs to rest and stop working so hard.

"Kim's not respecting her pregnancy," the insider claimed. "She's running around, working seven days a week. She's working with two different trainers to control her weight, including Tracy Anderson and a pregnancy trainer."

Meanwhile, TMZ reports that the doctors believe that Kardashian is suffering from flu-like symptoms, while a source claimed that the reality star is "stressed out" from her divorce battle with ex-husband Kris Humphries.